Road surface field mixing construction method with cement as energy agent

Abstract

The invention discloses a road surface field mixing construction method with cement as an energy agent. The method comprises the following steps that S1, a working face is prepared, specifically, the corresponding standard requirements are met according to the road grade; s2, material preparation: selecting a mixing field with sufficient area and sufficient soil and water source, collecting the soil, and preparing cement and Thalamin; s3, preparing equipment; s4, raw material mixing: mixing cement and soil to obtain a raw material; s5, preparation of a biological enzyme solution: dissolving Thyraldite in water in proportion, and preparing a spraying device; s5, carrying out spraying operation on a Thyraldite solution; s6, paving, rolling and forming; s7, performing static grinding, fine grinding and strong grinding; and S8, layer sealing operation is conducted, specifically, dry powder cement is applied to the rolled working face, a road roller is used for static rolling and polishing, and the technical problems that in the prior art, when cement is used as an energy agent, the requirement for front and back field operation is very high, and the construction progress and the construction quality cannot be guaranteed are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of road construction, and in particular relates to a road surface field mixing construction method using cement as an energy agent. Background Art

[0002] Tairan Bio-enzyme construction usually adopts road-mixing method. Road-mixing method is a very efficient construction method with fast speed and low operation cost. It is the preferred method, but it often requires a suitable construction environment and good construction equipment. However, the conditions for road-mixing method are often not available during on-site construction. In addition, cement is used as an energy agent. Because cement has a limited initial setting time, the mixed clinker must be spread and rolled immediately. Therefore, how to quickly connect the on-site mixed materials with the working surface is a difficult problem that technicians in this field have been thinking about. Summary of the invention

[0003] The purpose of the present invention is to provide a road surface mixing construction method using cement as an energy agent, so as to solve the technical problems in the above-mentioned prior art that when cement is used as an energy agent, the front and rear field operations are very high and the construction progress and quality cannot be guaranteed.

[0004] The technical solution adopted by the present invention to solve its technical problem is: A road surface field mixing construction method using cement as an energy agent comprises the following steps: S1. Work surface preparation: meet the corresponding requirements of the standards according to the highway grade; S2. Material preparation: Select a mixing site with sufficient area, soil and water, and prepare soil, cement and tyranase; S3. Equipment preparation: prepare large excavators, loaders and pumping equipment used in the mixing plant, as well as transfer vehicles and rollers used on the working surface; S4, raw material mixing: mixing cement and soil to obtain raw material; S5. Preparation of biological enzyme solution: dissolve the tyranase in water according to the proportion and prepare the spraying device; S5, spraying operation of tyranase solution: the dry material in step S4 is continuously moved and mixed by using an excavator, and the tyranase solution is sprayed on the pile during the mixing process to obtain clinker; S6, paving and rolling: The clinker is transported to the working surface by a transfer vehicle for paving and compaction, and the operator goes to the working surface with the vehicle; S7, static rolling, fine leveling and strong rolling: the paved and compacted road surface is statically rolled multiple times in the manner of first the two sides and then the middle, accompanied by precise leveling, and then a small vibration is turned on, and after the small vibration is completed, three slow and strong vibration rollings are performed; S8. Sealing operation: Sprinkle dry cement powder on the compacted working surface and use a roller to smooth it.

[0005] The present invention provides a road surface field mixing construction method using cement as an energy agent. In step s2, the mixing field has sufficient water sources for pumping, power supply can be connected, and the area is large enough for the operation of excavators and loaders.

[0006] In the present invention, a road surface field mixing construction method using cement as an energy agent is provided. In the step s2, 100 cubic meters of soil are prepared, and the 100 cubic meters of soil are piled in a large conical pile at a mixing position.

[0007] The present invention provides a road surface field mixing construction method using cement as an energy agent. In step s2, 7.5 tons of cement plus 2 bags are delivered to the soil stockpile on time.

[0008] The present invention provides a method for on-site mixing construction of a road surface using cement as an energy agent. In the step s5, a container with a volume of one cubic meter is used to prepare the solution, and 4.2 liters of tyranase is added.

[0009] The present invention discloses a road surface field mixing construction method using cement as an energy agent. Two submersible pumps with a flow rate of 1.5 cubic meters per hour are put into the solution preparation container for spraying operation, and each submersible pump is connected to a spray gun.

[0010] The present invention discloses a road surface mixing construction method using cement as an energy agent. In the spraying operation, two water spray guns cooperate with the mixing of an excavator to spray the tyranase solution onto the pile of materials, one of which is mainly responsible for spraying the old pile and the other is mainly responsible for spraying the new pile.

[0011] The present invention provides a road surface field mixing construction method using cement as an energy agent. The sprayed material pile is finely mixed twice, and the material pile is finely mixed twice by lifting and throwing it high by an excavator.

[0012] The present invention provides a road surface field mixing construction method using cement as an energy agent. In the step s6, the thickness of the semi-tight paving layer after rolling reaches 25 to 26 cm, the surface is flat, the corner materials are full, and the extra-wide fabrics are more than 40 cm each.

[0013] In the field-mixed road construction method using cement as an energy agent of the present invention, the operation time of step s4 is 10-15 minutes, and the operation time of step s5 is 18-25 minutes.

[0014] The beneficial effects of the present invention are as follows: a road surface field mixing construction method using cement as an energy agent is proposed, and the mixing quality and operation time are strictly controlled by controlling the delivery time and delivery amount of cement that matches the soil batch, as well as the mixing and paving time, so as to achieve high-quality and high-efficiency construction; the hardness quality of the road surface is improved by controlling the usage ratio of tyranase; the mixing quality can be improved by multiple fine mixing and removing debris from the soil, thereby improving the road surface quality; the utilization rate of personnel is improved by sharing the front and rear field personnel, and the mixing and paving time can be effectively controlled; the sealing layer is performed by thinly spreading dry powder cement to prevent the volatilization of active effective components. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention is clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0016] A road surface field mixing construction method using cement as an energy agent comprises the following steps 1. Construction preparation: The preparation work is divided into: work surface preparation, mixing site preparation, material preparation, machinery and tool personnel preparation.

[0017] A. Working surface preparation: The working surface of the bio-enzyme water-stabilized structure is the roadbed. The requirements for the roadbed in this embodiment are consistent with the national standards for ordinary roadbeds. That is, the main performance indicators meet the requirements of the roadbed 93 surface.

[0018] The main indicators are: compaction degree ≥93%; deflection value ≤200 (1 / 100mm).

[0019] Among the indicators of 93 surfaces, there is also a flatness of less than or equal to 3cm (three meters square foot). However, this construction site is a temporary construction access road. Therefore, it is relaxed to ≤5cm.

[0020] B. Mixing site preparation: After on-site inspection, a location is selected, which has a large enough area for all mixing operations, sufficient and convenient soil, a natural water source for pumping, and an accessible power source.

[0021] The above conditions are the necessary and sufficient conditions for all excavators and loaders to carry out field mixing operations.

[0022] C. Material preparation: divided into bulk materials and key materials.

[0023] There are three types of bulk materials: soil, cement and water.

[0024] Soil preparation: According to the size of the mixing equipment excavator, this site uses 100 cubic meters of mixed materials at a time. Therefore, before starting the work, the soil is prepared to make 100 cubic meters of soil in a cone pile state and piled at the mixing position.

[0025] When preparing cement, three rules must be followed. That is, when purchasing cement, the supplier must deliver it to the specified location in the specified quantity at the specified time. This is the key to the success of the project and must be strictly followed.

[0026] Specifically, at our construction site, a dump truck dumps 7.5 tons of cement plus two bags directly onto the soil pile at 8 a.m. on the construction day. (Note: the excavator can first dig a large gap in the soil, and the cement will just pour into the gap.) The second truck of 7.5 tons was delivered at 9:30 a.m. and dumped into the second pile of soil. And so on, until the construction task for the day was completed.

[0027] Water: There is a natural ditch next to the mixing position on the construction site. In preparation, the ditch should be blocked first to collect water. A basket is sunk into the water, and a submersible pump with a power supply and water pipe and a flow rate of 3 cubic meters per hour is placed in the basket. When the switch is pressed, water can be pumped.

[0028] The key material is tyranase. Prepare a plastic measuring cup (with a scale of about 2000ml).

[0029] D. Machinery, tools and personal preparation: The machinery and tools are divided into the front field and the back field. There are also clinker transfer trucks connecting the front field and the back field (the construction site needs to cooperate with temporary deployment).

[0030] The backyard (i.e. mixing yard) is small in scale and only requires a large excavator.

[0031] Tools: Two large water containers. Depending on the site conditions, use the existing empty plastic buckets (volume 1 cubic meter) on site. Place them at the enzyme distribution location in the mixing yard. Two submersible pumps with a flow rate of 1.5 cubic meters per hour (with power supply, water pipes, nozzles, and pipe connections). Three two-toothed rakes; three sharp sickles.

[0032] Special tools for the front field: broom, gloves, mask, small ash bucket; 3 of each.

[0033] Workers: General workers, 4. When the front field operation begins, two will be transferred to the front field with the transfer truck.

[0034] Frontcourt: Machinery: One excavator (responsible for roadbed treatment, clinker paving, rolling and leveling), so it is better to have a skilled operator in leveling operation. One roller (responsible for compacting the structure).

[0035] Tools: Two flat-blade shovels.

[0036] Workers: 2. They are transferred from the backyard along with the transfer truck.

[0037] 2. Backfield operation: 2.1. From raw materials to raw materials: This operation is actually the process of preliminarily mixing cement and soil. Generally, it only needs to be stirred once. This process is called: from raw materials to raw materials; commonly known as: dry mixing.

[0038] This operation is best performed by the largest excavator on the jobsite.

[0039] If the excavator is in the right position, the whole mixing process basically does not need to be moved. Just turn the soil back and forth on the excavator. Whenever you find a cement bag, cover it with soil and puncture and crush the cement bag as much as possible. The more broken the better. Do this until all the piles are moved and mixed. This process takes about 10 to 15 minutes.

[0040] 2.2. Preparation of biological enzyme solution: This operation is carried out simultaneously with dry mixing.

[0041] According to the test summary, the amount of water required for this 100 cubic meter mixture is about one ton. [The operating data of this "one ton of water" can also be used to accurately calculate the amount of water required for spraying based on the difference between the optimal water content obtained from the benchmark test and the water content of the material on site. It can also be quickly obtained through the on-site 10 kg spray bottle test.] Therefore, 4.2 liters of Tairan enzyme were evenly dissolved in one ton of water and two submersible pumps with a flow rate of 1.5 cubic meters per hour were put into use.

[0042] 2.3. Spraying of Tairan enzyme solution: This operation requires the excavator to continuously move the pile and mix it. While the excavator is mixing, two water spray guns cooperate with the excavator to spray the tyranase solution to the pile. One is mainly responsible for spraying the old pile and the other is mainly responsible for spraying the new pile.

[0043] The spraying operator must be active and flexible. Spray evenly and try to avoid missing or excessive spraying. If you want to stop spraying temporarily, you can bend the hose in your hand to achieve this. In this way, the spraying time and the stirring time can be roughly the same.

[0044] Workers, holding two-toothed rakes and sickles, pick out garbage, large rocks, organic impurities, cement bag fragments, etc. from the soil pile. Incompletely crushed cement bags are crushed with sickles.

[0045] The operation time is about 20 minutes.

[0046] 2.4. Fine mixing of the pile twice: Finally, the excavator lifts and throws the material pile twice to mix it finely.

[0047] At the same time, the worker continued the same operation as before. There was no interference from the spraying operation, and the operation was relatively thorough.

[0048] This operation is: from raw materials to clinker; commonly known as: wet mixing.

[0049] Requirements for this operation: uniformity.

[0050] Indicator: The soil color is uniform.

[0051] Detection method: observation.

[0052] Testing frequency: anytime.

[0053] When the requirements are met, the transfer vehicle is contacted in time and appropriately in advance, the clinker is loaded and transferred to the front yard. At the same time, a reserved package of cover cement and two workers are transferred to the front yard.

[0054] 3. Front field operation: 3.1. Roadbed re-inspection and problem handling: For a long time, for sites with heavy rainfall, roadbed water damage is difficult to avoid. It is necessary to carefully discover and properly handle roadbed problems.

[0055] First, prepare a sufficient amount of relatively dry soil suitable for roadbed treatment. An experienced manager, equipped with a general worker, guides the operation of the roller using a square-mouthed shovel and a two-toothed rake as working tools, and observes the reaction of heavy vehicles rolling over the roadbed. Find the causes of roadbed springs, horizontal fish-scale cracks on the surface, longitudinal mud slurry, deep rutting, etc., and take corresponding treatment measures.

[0056] During the processing, the road depressions are filled with suitable materials and leveled and compacted by repeated rolling.

[0057] Road construction is a covering structure, and all the things that will be covered on the working surface must be properly handled before the arrival of clinker.

[0058] Use white lime to mark the paving width range and determine the linear direction of the construction access road.

[0059] The roadbed section that has been properly treated can then start the clinker paving operation.

[0060] 3.2. Clinker paving: The initial section of this project is a large longitudinal slope. The excavator is used for paving and leveling. Chain rails are needed to roll the new paved surface repeatedly. Repeat the above actions until the thickness of the semi-tight paving layer reaches 25-26cm after rolling and the surface is flat. Pay attention to the fullness of the corner materials. The extra-wide fabric is more than 40cm each.

[0061] When the excavator is paving, various impurities and oversized stones are picked out manually.

[0062] Once the requirements are met, start the rolling operation.

[0063] 3.3. Quiet rolling, fine leveling and strong rolling: The roller should be rolled statically multiple times, first on the two sides and then in the middle. The process should be accompanied by precise leveling. It is forbidden to start vibration before the leveling work is completed.

[0064] After leveling is completed, turn on the vibration. During this operation, a small amount of dry cement powder must be evenly spread on the top of the roller's steel wheel. Remember the key point of this operation, which is to spread a small amount, half a handful at a time, in a scattered manner. Do not repeat. Otherwise, it may cause the surface moisture to be unbalanced and wrinkles to appear during rolling.

[0065] After completing the small vibration, perform three times of slow and strong vibration rolling.

[0066] 3.4, Sealing layer: Spread dry cement powder thinly to seal the layer and prevent the volatilization of active ingredients. Roll the surface with a roller to smooth it.

[0067] Key points: 100% coverage, the thinner the better.

[0068] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0069] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0070] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A road surface field mixing construction method using cement as an energy agent, characterized in that: The following steps are involved: S1. Work surface preparation: meet the corresponding requirements of the standards according to the highway grade; S2. Material preparation: Select a mixing site with sufficient area, soil and water, and prepare soil, cement and tyranase; S3. Equipment preparation: prepare large excavators, loaders and pumping equipment used in the mixing plant, as well as transfer vehicles and rollers used on the working surface; S4, raw material mixing: mixing cement and soil to obtain raw material; S5. Preparation of biological enzyme solution: dissolve the tyranase in water according to the proportion and prepare the spraying device; S5, spraying operation of tyranase solution: the dry material in step S4 is continuously moved and mixed by using an excavator, and the tyranase solution is sprayed on the pile during the mixing process to obtain clinker; S6, paving and rolling: The clinker is transported to the working surface by a transfer vehicle for paving and compaction, and the operator goes to the working surface with the vehicle; S7, static rolling, fine leveling and strong rolling: the paved and compacted road surface is statically rolled multiple times in the manner of first the two sides and then the middle, accompanied by precise leveling, and then a small vibration is turned on, and after the small vibration is completed, three slow and strong vibration rollings are performed; S8. Sealing operation: Sprinkle dry cement powder on the compacted working surface and use a roller to smooth it.

2. A road surface field mixing construction method using cement as an energy agent according to claim 1, characterized in that: In step s2, the mixing plant has sufficient water sources for pumping, power supply is available, and the area is large enough for the operation of excavators and loaders.

3. A road surface field mixing construction method using cement as an energy agent according to claim 1, characterized in that: In step s2, 100 cubic meters of soil are prepared, and the 100 cubic meters of soil are piled in a large conical pile at the mixing position.

4. A road surface field mixing construction method using cement as an energy agent according to claim 3, characterized in that: In step s2, 7.5 tons of cement plus 2 bags are delivered to the soil pile on time.

5. The method for road surface field mixing construction using cement as an energy agent according to claim 1, characterized in that: In step s5, a container with a volume of one cubic meter is used to prepare the solution, and 4.2 liters of tyranase is added.

6. A road surface field mixing construction method using cement as an energy agent according to claim 5, characterized in that: Two submersible pumps with a flow rate of 1.5 cubic meters per hour are placed in the solution preparation container for spraying operations, and each submersible pump is connected to a spray gun.

7. A road surface field mixing construction method using cement as an energy agent according to claim 6, characterized in that: During the spraying operation, two water spray guns cooperate with the excavator to spray the tyranase solution onto the pile, one of which is mainly responsible for spraying the old pile and the other is mainly responsible for spraying the new pile.

8. A road surface field mixing construction method using cement as an energy agent according to claim 6, characterized in that: The pile of materials after spraying is finely mixed twice, and the excavator lifts and throws the pile of materials high twice for fine mixing.

9. The method for road surface field mixing construction using cement as an energy agent according to claim 1, characterized in that: After rolling in step s6, the thickness of the semi-tight paving layer reaches 25-26 cm, the surface is flat, the corner materials are full, and the extra-wide fabrics are more than 40 cm.

10. A road surface field mixing construction method using cement as an energy agent according to claim 1, characterized in that: The operation time of step s4 is 10-15 minutes, and the operation time of step s5 is 18-25 minutes.